Pdp11/23+ EPROM upgrade
roeapeterson at gmail.com
Fri Feb 6 17:13:22 CST 2015
> On Feb 6, 2015, machine. A 64K chip is going to be totally meaningless.
>>>> So why are you looking for a 64K chip? (27512 I would assume that would be...)
>>> 2716 = 16k bits = 2kbytes X 8 bits
>>> 2764 = 64k bits = 8kbytes X 8 bits
>>> The latest rom images for the 11/23+ require 8kbyte chips.
>> Ah, so 2764, not 64K bytes... Oh well... :-)
>> When did people start counting memory sizes in bits???
ROMs are like bandwidth on the Internet, sold in bits (kbits, megabits) ,consumed in bytes.
> Oh, at least as early as the mid-70s, with the 2708 (1KByte).
> Yes, I too wish they had used bytes for eprom sizes.
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